How to Fix an External Monitor Not Detected
When Windows does not see a second screen, check the cable and the monitor's input first, then Detect and Win + P, before you reinstall graphics drivers from a random site.
Monitors & Displays
External screens that stay black, flicker, or are not detected.
Start with the closest symptom
These guides are grouped here because the first checks overlap. Open the guide that best matches what you see now, then use its verification section before moving to a broader fix.
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